untreated
adjective
un·treat·ed
ˌən-ˈtrē-təd 
: not treated
untreated wastewater
especially
: not improved or controlled medically
an untreated case of pneumonia
untreated diabetic patients
Examples of untreated in a Sentence
untreated wool
Recent Examples on the Web
Left untreated, the bite may continue to grow, and the wound could become infected.
—
Alyce Collins, MSNBC Newsweek, 11 July 2025
More serious conditions like infection can also occur if contaminated water enters small cuts or open wounds in the skin, and can progress to sepsis if left untreated.
—Bymary Kekatos, ABC News, 11 July 2025
Yet the condition can lead to heart disease, diabetes, stroke, depression and even premature death if left untreated.
—Sandee Lamotte, CNN Money, 11 July 2025
This results in long, deep wounds in the surrounding flesh that are also susceptible to secondary bacterial infections, causing severe pain, and potentially death if left untreated.
—Elizabeth Weise, USA Today, 10 July 2025
See All Example Sentences for untreated
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Alyce Collins, MSNBC Newsweek, 11 July 2025
More serious conditions like infection can also occur if contaminated water enters small cuts or open wounds in the skin, and can progress to sepsis if left untreated.
—Bymary Kekatos, ABC News, 11 July 2025
Yet the condition can lead to heart disease, diabetes, stroke, depression and even premature death if left untreated.
—Sandee Lamotte, CNN Money, 11 July 2025
This results in long, deep wounds in the surrounding flesh that are also susceptible to secondary bacterial infections, causing severe pain, and potentially death if left untreated.
—Elizabeth Weise, USA Today, 10 July 2025
See All Example Sentences for untreated
Cite this Entry
“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 1 Aug. 2025.
Copy CitationMedical Definition
untreated
adjective
un·treat·ed
-ˈtrēt-əd
: not subjected to treatment
an untreated disease
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